MC and A (Materials Control and Accounting) Reform Amendment: Example System Beta Variance Estimates and Performance Evaluation.

摘要

The United States Nuclear Regulatory Commission (NRC) has developed an Advanced Notice of Proposed Rulemaking for Materials Control and Accounting (MC&A) that requires licensees to use process monitoring data to provide timely (24 h) detection and resolution of potential losses of strategic special nuclear materials (SSNM). To furnish guidance to licensees in complying with the loss-detection requirements of this proposed MC&A Reform Amendment, (published September 10, 1981) the NRC has initiated two example-system development studies. The second of these studies, entitled 'Material Control and Accounting Upgrade Rule Example System Beta,' is the subject of this report and differs from the first study by allowing modifications to the reference process design to develop a best case approach. In addition, this second study addresses only the detection provisions of the Reform Amendment and response features needed to achieve detection goals because these are the areas where advanced technologies and process changes will have an impact on system compliance.